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Compound auroral micromorphology: ground-based high-speed imaging
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2015 (English)In: EARTH PLANETS AND SPACE, ISSN 1880-5981, Vol. 67, 23Article in journal (Refereed) Published
Abstract [en]

Auroral microphysics still remains partly unexplored. Cutting-edge ground-based optical observations using scientific complementary metal-oxide semiconductor (sCMOS) cameras recently enabled us to observe the fine-scale morphology of bright aurora at magnetic zenith for a variety of rapidly varying features for long uninterrupted periods. We report two interesting examples of combinations of fine-scale rapidly varying auroral features as observed by the sCMOS cameras installed at Poker Flat Research Range (PFRR), Alaska, in February 2014. The first example shows that flickering rays and pulsating modulation simultaneously appeared at the middle of a surge in the pre-midnight sector. The second example shows localized flickering aurora associated with growing eddies at the poleward edge of an arc in the midnight sector.

Place, publisher, year, edition, pages
2015. Vol. 67, 23
Keyword [en]
Aurora, Magnetosphere-ionosphere coupling, Wave-particle interaction
National Category
Geology
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URN: urn:nbn:se:kth:diva-162955DOI: 10.1186/s40623-015-0190-6ISI: 000350331100001Scopus ID: 2-s2.0-84923358601OAI: oai:DiVA.org:kth-162955DiVA: diva2:800061
Note

QC 20150401

Available from: 2015-04-01 Created: 2015-03-26 Last updated: 2015-04-01Bibliographically approved

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Dahlgren, HannaIvchenko, Nickolay

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